Abstract
For bidirectional inductive power transfer (BIPT) system, transmission efficiency optimization and widen zero voltage switching (ZVS) is important. In the BIPT system, to optimize the above issues, the dual-phase-shift (DPS) and triple- phase-shift (TPS) with the fundamental component are adopted. However, as the load power required of the system is decreased, the realization of ZVS is difficult, which is necessary to reduce the phase shift angle (PSA). And the system transmission power factor and efficiency will decrease. In this paper, fundamental- harmonic-hybrid (FHH) power transfer strategy is proposed for the optimization of the ZVS and system efficiency. Firstly, the relationship of the ZVS and efficiency with the transfer power of the BIPT is analyzed. Secondly, the implementation of strategy FHH is obtained, including the application condition, the realization of ZVS and the efficiency improvement. Finally, the simulations are performed. Compared with TPS strategy with the fundamental component, the transmission efficiency and power factor with FHH is improved under light load condition.
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